JPH0658494B2 - Projection screen device - Google Patents
Projection screen deviceInfo
- Publication number
- JPH0658494B2 JPH0658494B2 JP1152209A JP15220989A JPH0658494B2 JP H0658494 B2 JPH0658494 B2 JP H0658494B2 JP 1152209 A JP1152209 A JP 1152209A JP 15220989 A JP15220989 A JP 15220989A JP H0658494 B2 JPH0658494 B2 JP H0658494B2
- Authority
- JP
- Japan
- Prior art keywords
- film
- screen
- outer peripheral
- frame tube
- peripheral frame
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/54—Accessories
- G03B21/56—Projection screens
- G03B21/60—Projection screens characterised by the nature of the surface
- G03B21/602—Lenticular screens
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/54—Accessories
- G03B21/56—Projection screens
- G03B21/58—Projection screens collapsible, e.g. foldable; of variable area
- G03B21/585—Inflatable screens
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Overhead Projectors And Projection Screens (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、ＯＨＰ（オーバーヘッドプロジェクタ）、Ｖ
Ｐ（ビデオプロジェクタ）、或いはＬＣＰ（液晶プロジ
ェクタ）等の映写に使用する高輝度指向性映写スクリー
ン装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an OHP (overhead projector), a V
The present invention relates to a high-luminance directional projection screen device used for projection such as P (video projector) or LCP (liquid crystal projector).
映写スクリーン装置のスクリー膜は、通常その表面に良
好な映像を結ばせるために微細なマット処理（梨地処
理）が施されているが、像形成の面から反射型と透過型
に、またスクリーン膜の断面形状により平面型と曲面
（凹面）型に、さらには不使用時等の保管形態によって
非変形型と可変形型に各々分類できる。この可変形型と
しては折り畳み式や巻き取り式がある。そして、これら
の各型が組合わされて種々の形式が構成される。The screen film of a projection screen device is usually subjected to a fine matte treatment (satin finish) to form a good image on its surface. It can be classified into a flat type and a curved type (concave) type according to the cross-sectional shape, and a non-deformable type and a variable type depending on the storage form when it is not used. The variable type includes a folding type and a winding type. Then, these types are combined to form various types.
ところで、通常、映像反射スクリーンは、白色の布やビ
ニール、又はガラス粉やアルミ粉等を塗布した布地等を
用いて、映像入射光を全方向にむらなく明るく反射させ
るものが用いられてきた。しかし、この反射スクリーン
は、映像光以外の他から入ってくる光も同様に反射する
ので、両光線が混合して映像のコントラストが低く不明
瞭になるという問題があった。そこで、通常は映写場所
を暗くしていた。このような反射スクリーンは、輝度ゲ
インも４以下と少なく、指向性も弱く、少し位の凹凸も
皺歪等も目立たないので、不要の時や運搬時には巻き取
って、体積を小さくするのが普通であった。By the way, usually, as the image reflection screen, a white cloth or vinyl, or a cloth coated with glass powder, aluminum powder, or the like, which reflects the image incident light brightly in all directions, has been used. However, this reflection screen also reflects light that comes in from other than the image light, so that there is a problem that both light rays are mixed and the contrast of the image is low and unclear. Therefore, the projection place was usually darkened. Such a reflective screen has a low brightness gain of 4 or less, weak directivity, and has no noticeable unevenness or wrinkle distortion, so it is usually wound up when not needed or transported to reduce the volume. Met.
しかし、諸般の事情により明るい場所での映写が要求さ
れ、そのような明るい場所でもコントラストの高い良好
な映写画像を見ることができるスクリーン膜が必要とな
ってきている。However, due to various circumstances, projection in a bright place is required, and a screen film capable of viewing a good projected image with high contrast even in such a bright place is required.
そのために反射型では、投影機から投射された映像光線
をできるだけ効率的に、しかも広範囲の多数の観察者に
平等に届くように、スクリーン膜で反射させる必要があ
る。一方、投影機映像光以外の方向からの不必要な光線
は、観察者以外の方向に反射させる必要がある。Therefore, in the reflection type, it is necessary to reflect the image light beam projected from the projector by the screen film so as to reach the large number of observers in a wide range evenly as efficiently as possible. On the other hand, unnecessary light rays from directions other than the projector image light need to be reflected in directions other than the observer.
このため、スクリーン膜に入って反射する光線に強い指
向性が要求される。特にＶＰやＬＣＰのように弱い光度
の画像を拡大する映写では、スクリーン上の画像輝度が
弱くなるため、観察者方向への反射効率（能率）、つま
り指向性をより高める必要がある。Therefore, a strong directivity is required for the light rays that enter the screen film and are reflected. In particular, in projection such as VP and LCP for enlarging an image with weak light intensity, the image brightness on the screen becomes weaker, so it is necessary to further increase the reflection efficiency (efficiency) in the observer direction, that is, the directivity.
この目的のために、反射膜に高い反射特性を有するアル
ミ箔あるいはアルミ蒸着フイルム等を使用し、その反射
膜の前面に例えばシリンドリカルエンボスを加工したタ
レンズを設けて輝度ゲインを１０以上にし、その反射膜
面を１次カーブ（横方向に孤状）乃至２次カーブ（縦方
向に孤状）の凹面に形成して反射方向を規制した高輝度
指向性スクリーン膜が提案されている。For this purpose, an aluminum foil or an aluminum vapor-deposited film having a high reflection characteristic is used for the reflection film, and a lens lens having, for example, a cylindrical emboss is provided on the front surface of the reflection film to increase the brightness gain to 10 or more. There has been proposed a high-brightness directional screen film in which the film surface is formed as a concave surface of a primary curve (horizontal direction is arcuate) or a secondary curve (vertical direction is arcuate) to regulate the reflection direction.
しかし、このような反射−凹面型のスクリーン膜は、反
射膜面が高輝度であり、僅かの凹凸、歪み、皺或いは弛
みによっても映写画面の一部に極端な明暗ができてしま
うので、スクリーン膜は完全な滑平面に形成する必要が
ある。However, in such a reflective-concave screen film, the reflective film surface has a high brightness, and even a slight unevenness, distortion, wrinkles or slack causes extreme light and dark in a part of the projection screen, The membrane should be formed in a perfectly smooth plane.
よって、従来では上記特性を有するスクリーン膜を、表
面が平滑で変形し難い金属または合成樹脂等の頑強な板
状体に貼合しこれを固定枠に固定するので、非変形型に
せざるを得なかった。Therefore, conventionally, the screen film having the above-mentioned characteristics is bonded to a rigid plate-like body such as metal or synthetic resin having a smooth surface and difficult to be deformed, and the plate-like body is fixed to a fixing frame. There wasn't.
上記のように高輝度指向性映写スクリーン装置は、スク
リーン膜を支持する部材として頑強な板状体が必須であ
るので、巻き上げたり、分解したり、組み立てたりする
ことが不可能で、運搬・保管・取付等が不便であった。
特に近時では映像情報機器の発達で大面積のスクリーン
の需要が増大して来ているためこの問題は深刻である。As described above, the high-intensity directional projection screen device requires a robust plate-like member as a member for supporting the screen film, so it cannot be rolled up, disassembled, or assembled, and is transported and stored.・ Installation was inconvenient.
Particularly, recently, the demand for large-area screens has increased due to the development of video information equipment, and this problem is serious.
本発明は上述の如き事情に鑑みてなされたもので、その
目的は、輝度ゲインを１０以上に保ち、しかも滑らかな
大面積のスクリーン膜を実現でき、運搬・保管・取付も
容易で、さらに反射型、透過型の何れにも適用できるよ
うにした映写スクリーン装置を提供することである。The present invention has been made in view of the circumstances as described above, and an object thereof is to maintain a brightness gain of 10 or more and to realize a smooth large-area screen film, which is easy to transport, store, and attach, and which is further reflective. It is an object of the present invention to provide a projection screen device which can be applied to both a projection type and a transmission type.
このために本発明の映写スクリーン装置は、可撓性を有
するエンドレスの外周枠チューブと、該外周枠チューブ
の全周に全周を密着接合させた可撓性を有するスクリー
ン膜とを具備し、該外周枠チューブを流体の圧入により
膨張硬直させて上記スクリーン膜を張設するようにした
映写スクリーン装置において、 上記外周枠チューブの前面側全周に上記スクリーン膜を
密着接合させるとともに、背面側全周に可撓性を有する
ベース膜を密着接合させ、上記外周枠チューブへの流体
圧入により、上記スクリーン膜で張設されると共に、上
記スクリーン膜、上記ベース膜および上記外周枠チュー
ブで囲まれる内部空間が減圧状態になるように構成し
た。To this end, the projection screen device of the present invention comprises a flexible endless outer peripheral frame tube, and a flexible screen film in which the entire periphery of the outer peripheral frame tube is closely adhered and joined. In a projection screen device in which the outer peripheral frame tube is expanded and hardened by pressurizing fluid to stretch the screen film, the outer peripheral frame tube is tightly joined to the entire front side of the outer peripheral frame tube, and at the same time, the entire rear side is bonded. An inner periphery surrounded by the screen film, the base film, and the outer peripheral frame tube, which is tightly joined to a periphery by a flexible base film and is stretched by the screen film by fluid pressure fitting into the outer peripheral frame tube. The space was configured to be in a reduced pressure state.
以下、本発明の実施例の映写スクリーン装置について説
明する。第１図(a)は第１の実施例の反射型の映写スク
リーン装置の正面図、第１図(b)はその垂直断面端面図
である。Hereinafter, a projection screen device according to an embodiment of the present invention will be described. FIG. 1 (a) is a front view of the reflection type projection screen device of the first embodiment, and FIG. 1 (b) is a vertical sectional end view thereof.
１は全体を横長のほぼ４角形（例えば横／縦＝４／３）
に形成したスクリーン膜で、ポリエステル等の可撓性シ
ートを基材として、その表面全面にアルミ蒸着等の反射
膜を形成したものである。２は該スクリーン膜１の全周
縁に密着接合したサークル（エンドレス）状の外周枠チ
ューブで、合成ゴム或いは塩化ビニル等の可撓・弾性体
で形成され、後記するように内部に空気や油等の流体が
圧入できるようになっている。第１図(a)(b)では外周枠
チューブ２内に流体が圧入されている状態を示してい
る。流体を排出した状態では第２図(b)に示すように外
周枠チューブ２は板状に萎縮する（第５図(a)(b)参
照）。1 is a horizontally long almost rectangular shape (for example, horizontal / vertical = 4/3)
In the screen film formed in the above, a flexible sheet such as polyester is used as a base material and a reflective film such as aluminum vapor deposition is formed on the entire surface thereof. Reference numeral 2 denotes a circle (endless) outer peripheral frame tube that is tightly joined to the entire periphery of the screen film 1, and is formed of a flexible / elastic body such as synthetic rubber or vinyl chloride, and has air, oil, etc. inside as described later. The fluid can be press-fitted. FIGS. 1 (a) and 1 (b) show a state in which a fluid is press-fitted into the outer peripheral frame tube 2. When the fluid is discharged, the outer peripheral frame tube 2 shrinks into a plate shape as shown in FIG. 2 (b) (see FIG. 5 (a) (b)).
３はスクリーン膜１の背面に対面させて外周枠チューブ
２の背面側に密着接合したベース膜で、塩化ビニルコー
トレザー等の可撓性をもつ気密性のシートでなり、上端
部が外周枠チューブ２の上端より延出している。ベース
膜３の外周枠チューブ２に対する密着接合位置はスクリ
ーン膜１の外周枠チューブ２に対する密着接合位置から
当該チューブ２の円周角度で１８０度反対側の位置であ
る（第５図(a)参照）。Reference numeral 3 is a base film which is faced to the back surface of the screen film 1 and is closely bonded to the back surface side of the outer peripheral frame tube 2. The base film 3 is a flexible airtight sheet such as vinyl chloride coated leather, and the upper end portion is the outer peripheral frame tube. It extends from the upper end of 2. The close contact position of the base film 3 with respect to the outer peripheral frame tube 2 is a position opposite to the close contact position of the screen film 1 with respect to the outer peripheral frame tube 2 by 180 degrees at the circumferential angle of the tube 2 (see FIG. 5 (a)). ).
以上によりスクリーン膜１、ベース膜３及び外周枠チュ
ーブ２で囲まれた狭い空間部４は完全気密となる。As described above, the narrow space 4 surrounded by the screen film 1, the base film 3 and the outer peripheral frame tube 2 is completely airtight.
５はベース膜３の上端縁部に取付けた巻取軸で、中心部
に装着した軸芯５ａにより回転可能に支持されている。
該軸芯５ａは支持装置（図示せず）等により保持され
る。A winding shaft 5 is attached to the upper edge of the base film 3 and is rotatably supported by a shaft core 5a attached to the center.
The shaft core 5a is held by a supporting device (not shown) or the like.
６は外周枠チューブ２の一端部（例えば下縁）に設けた
バルブで、外周枠チューブ２に対する流体の圧入又は吐
出のためのものである。このバルブ６により流体を圧入
し又は吐出させる場合は当該バルブ６に可逆回転電動ポ
ンプ７あるいは手動ポンプ（図示せず）等を取り付けて
行う。Reference numeral 6 denotes a valve provided at one end (for example, a lower edge) of the outer peripheral frame tube 2 for press-fitting or discharging a fluid into the outer peripheral frame tube 2. When the fluid is press-fitted or discharged by the valve 6, a reversible rotary electric pump 7 or a manual pump (not shown) is attached to the valve 6.
今、バルブ６に取り付けた可逆回転電動ポンプ７を駆動
して外周枠チューブ２内に空気を圧入すると、該外周枠
チューブ２はブルドンの密閉管の作用で外方向に拡張す
る力が生じて、膨張硬直する。これによりスクリーン膜
１及びベース膜３は面方向の全方位に緊張され滑面とな
る。Now, when the reversible rotary electric pump 7 attached to the valve 6 is driven to press air into the outer peripheral frame tube 2, a force to expand the outer peripheral frame tube 2 outward due to the action of the closed tube of Bourdon is generated. Expansion and stiffness. As a result, the screen film 1 and the base film 3 are strained in all the directions of the surface direction to form a smooth surface.
このとき空間部４は負圧となるので、スクリーン膜１と
ベース膜３は、中心部付近では相互に接近する。あた外
周枠チューブ２部では該外周枠チューブの膨張によりそ
の直径幅が増大するので、スクリーン膜１とベース膜３
は相互に離反する。この結果、スクリーン膜１は中心部
がベース膜３側へ凹んだ凹面となる。この凹面の曲率は
下記の種々の手法で加減調整することができる。At this time, since the space portion 4 has a negative pressure, the screen film 1 and the base film 3 approach each other near the central portion. The diameter of the outer peripheral frame tube 2 is increased by the expansion of the outer peripheral frame tube, so that the screen film 1 and the base film 3
Separate from each other. As a result, the screen film 1 becomes a concave surface whose central portion is recessed toward the base film 3 side. The curvature of the concave surface can be adjusted by various methods described below.
第１の手法は外周枠チューブ２内への圧入空気量の調整
である。例えば外周枠チューブ２内への圧入空気量を増
大させると、外周枠チューブ２は膨張してその直径が増
大し、スクリーン膜１の曲率半径は小さくなる。The first method is adjusting the amount of press-fitted air into the outer peripheral frame tube 2. For example, when the amount of press-fitted air into the outer peripheral frame tube 2 is increased, the outer peripheral frame tube 2 expands and its diameter increases, and the radius of curvature of the screen film 1 decreases.
第２の手法はスクリーン膜１とベース膜３との可撓性の
バランスによる調整である。例えばスクリーン膜１を柔
軟性の材料で、ベース膜３をポリエステルの如き伸張性
のない材料で構成すると、スクリーン膜１は極端な凹面
となるが、背面のベース膜３はほぼ平面となる（後述す
る第２の実施例の第７図参照）。The second method is adjustment by balancing the flexibility of the screen film 1 and the base film 3. For example, when the screen film 1 is made of a flexible material and the base film 3 is made of a non-stretchable material such as polyester, the screen film 1 has an extremely concave surface, but the base film 3 on the back surface is almost flat (described later). (See FIG. 7 of the second embodiment).
第３の手法は外周枠チューブ２の大きさや形状を変える
ことである。例えば外周枠チューブ２の直径を大きくし
たり、第６図(a)(b)に示す外周枠チューブ２Ａ、２Ｂの
ようにその断面を変形させてその幅を大きくさせると、
外周枠チューブ部のスクリーン膜１とベース膜３との離
反幅は大きくなりスクリーン膜１の曲率半径も小さくな
る。The third method is to change the size and shape of the outer peripheral frame tube 2. For example, if the diameter of the outer peripheral frame tube 2 is increased or the cross section is deformed to increase the width as in the outer peripheral frame tubes 2A and 2B shown in FIGS. 6 (a) and 6 (b),
The width of separation between the screen film 1 and the base film 3 in the outer peripheral frame tube portion increases and the radius of curvature of the screen film 1 also decreases.
第４の手法は空間部４内の空気量の調整である。例えば
空間部４内の空気量を減量（空気出入手段は図示せず）
すると、空間部４内はさらに減圧され、スクリーン膜１
の曲率半径はその減圧に伴ってさらに小さくなる。な
お、空間部４と外部とを連通する通気孔等を設けた場合
には空間部４内は減圧されないので、スクリーン膜１及
びベース膜３は常に平面に張設される。The fourth method is adjusting the amount of air in the space 4. For example, the amount of air in the space 4 is reduced (air in / out means is not shown)
Then, the pressure in the space 4 is further reduced, and the screen film 1
The radius of curvature of becomes smaller as the pressure is reduced. In addition, when a vent hole or the like that connects the space portion 4 to the outside is provided, the inside of the space portion 4 is not depressurized, so that the screen film 1 and the base film 3 are always stretched on a flat surface.
以上のように構成したスクリーン膜１は外周枠チューブ
２によってその全周縁が外方に強力に伸張されるので全
面は緊張され滑面となる。しかもその滑面を目的カーブ
の凹面にあるいは平面にすることは容易である。この状
態で映写スクリーンとしての使用が可能となる。使用中
はバルブ６を閉じて外周枠チューブ２の流体が漏出しな
いようにして可逆回転電動ポンプ７を取り外すこともで
きる。Since the entire circumference of the screen film 1 constructed as described above is strongly extended outward by the outer peripheral frame tube 2, the entire surface is tensioned and becomes a smooth surface. Moreover, it is easy to make the smooth surface concave or flat on the target curve. In this state, it can be used as a projection screen. During use, the reversible rotary electric pump 7 can be removed by closing the valve 6 so that the fluid in the outer peripheral frame tube 2 does not leak.
一方、不使用時には次の方法によってコンパクトに収納
することができる。まず、可逆回転電動ポンプ６を逆回
転させて外周枠チューブ２内の流体を吐出させる。これ
により外周枠チューブ２は板状に萎縮し柔軟となり、ス
クリーン膜１とベース膜３も弛緩する。つまり全体が柔
軟なシート状となる。On the other hand, when not in use, it can be compactly stored by the following method. First, the reversible rotary electric pump 6 is reversely rotated to discharge the fluid in the outer peripheral frame tube 2. As a result, the outer peripheral frame tube 2 contracts into a plate shape and becomes flexible, and the screen film 1 and the base film 3 also relax. In other words, the whole becomes a flexible sheet.
その後可逆回転電動ポンプ６を取外し、巻取軸５を回転
させてベース膜３を巻取ると、これと共にスクリーン膜
１及び外周枠チューブ２も巻取られる（第３図(a)(b)、
第４図(a)(b)）。このように巻取られた映写スクリーン
装置は棒状となるので運搬や保管収納が便利である。こ
の状態から使用状態（第１図(a)(b)）にするには上記と
逆の操作を行えばよい（第４図第３図第２図第１
図）。なお、スクリーン膜１は、巻き戻した場合に、上
下左右の外周縁部分に外周枠チューブ２の潰れた厚みが
あるので、スクリーン膜とベース膜との間に摩擦を生ぜ
ず、折り畳み皺が生じることはない。After that, the reversible rotary electric pump 6 is removed, and the winding shaft 5 is rotated to wind up the base film 3, so that the screen film 1 and the outer peripheral frame tube 2 are also taken up (Fig. 3 (a) (b),
Fig. 4 (a) (b)). The projection screen device wound up in this way has a rod-like shape, which is convenient for transportation and storage. To switch from this state to the use state (FIGS. 1 (a) and (b)), the reverse operation to the above may be performed (FIG. 4, FIG. 3, FIG. 2, FIG.
Figure). When the screen film 1 is rewound, the outer peripheral frame tube 2 has a crushed thickness at the upper, lower, left, and right outer peripheral edge portions, so that no friction occurs between the screen film and the base film, and folding wrinkles occur. There is no such thing.
第７図は上述で触れた第２の実施例を示すもので、この
実施例のスクリーン装置は、スクリーン膜１に極端な凹
面を形成するよう、上述したように背面のベース膜３を
ほぼ平面にした例である。この例では巻取軸を設けない
で、使用時には適当な棒体、支柱等の支持具で建造物の
壁等に支持するか、吊り下げて固定する。この場合全体
が軽量なのでその操作は容易である。なお、運搬は別個
な巻取軸に巻き付けて行う。FIG. 7 shows the second embodiment mentioned above. In the screen device of this embodiment, the base film 3 on the back surface is almost flat as described above so as to form an extremely concave surface on the screen film 1. It is an example. In this example, the winding shaft is not provided, and when it is used, it is supported on a wall of a building or the like by a suitable supporting member such as a rod or a pillar, or is suspended and fixed. In this case, since the whole is lightweight, its operation is easy. In addition, transportation is performed by winding around a separate winding shaft.
ところで、第１及び第２の実施例で説明した反射−曲面
型のスクリーン膜は、全体の映写画像を明るくすること
ができる半面、中心部に画像のピントを合わせた場合、
四角部分にピントずれ、デフォルメ現象が発生する問題
がある。By the way, the reflection-curved screen film described in the first and second embodiments can make the entire projected image brighter, but when the image is focused on the center,
There is a problem that the square part is out of focus and the deformation phenomenon occurs.
これは、本来的に投影装置が、映写画像を平面スクリー
ン膜に映写した場合にピントが正しくなるように設計さ
れていることによる。つまり凹面スクリーンの１次カー
ブ、２次カーブの曲率半径は投影装置とスクリーンとの
距離に関わり、その距離が近ければ曲率半径は小さく遠
ければ大きくなる。明るい画像を見るためには投射距離
を短くしなければならず、曲率半径をどうしても小さく
せざるを得ない。曲率半径を小さくするとスクリーンの
四角部において平面（仮想）とのずれが大きくなり、ピ
ントずれ、デフォルメ現象が発生するのである。This is because the projection device is originally designed so that the focus is correct when the projected image is projected on the flat screen film. That is, the radii of curvature of the primary curve and the quadratic curve of the concave screen are related to the distance between the projection device and the screen. If the distance is short, the radius of curvature is small, and if it is far, it is large. In order to see a bright image, the projection distance must be shortened, and the radius of curvature must be reduced. When the radius of curvature is reduced, the deviation from the plane (imaginary) in the square portion of the screen becomes large, and the focus deviation and the deformation phenomenon occur.
また、反射（叉は透過）−平面型のスクリーンでは、映
写画像の全体のピントを合わすことができる半面、四角
部分が暗くなる問題があった。Further, in the case of a reflective (or transmissive) -flat type screen, there is a problem that a square portion is dark on a half surface where the entire projected image can be focused.
このように平面型と曲面型には各々一長一短がある。As described above, each of the flat type and the curved type has advantages and disadvantages.
第８図(a)(b)はこの点を解決した第３の実施例のスクリ
ーン膜８のを示す図である。なお、ここでは外周枠チュ
ーブは省略している。このスクリーン膜８は、蒸着アル
ミ転写層からなる反射膜９を付着したビニール（１００
μｍ厚）１０の該反射膜９の前面に、ビニール（２００
μｍ厚）からなるレンズ膜１１を貼着したものである。
通常はこのスクリーン膜８のレンズ膜１１をシリンドリ
カルエンボスレンズ１２の膜にして、更に全体を２次カ
ーブの凹面を形成し、反射光が上下方向に散逸しないよ
うにして使用している。FIGS. 8 (a) and 8 (b) are views showing the screen film 8 of the third embodiment which solves this problem. The outer peripheral frame tube is omitted here. The screen film 8 is made of vinyl (100
a vinyl film (200 μm thick) 10 on the front surface of the reflection film 9
The lens film 11 having a thickness (μm) is attached.
Usually, the lens film 11 of the screen film 8 is used as a film of the cylindrical embossed lens 12, and a concave surface of a quadratic curve is further formed so that the reflected light does not scatter vertically.
本例ではこの二次カーブを形成しないで二次カーブと同
等の効果を得るレンズ部分をレンズ膜１１に形成してい
る。すなわち各シリンドリカルエンボスレンズ１２を、
９〜１０本／mm程度以上の密度で並列状態に形成した点
に加えて、このシリンドリカルレンズ１２にクサビ状の
切欠部１３を形成したフレンネルレンズ式を利用してい
る。In this example, the lens film 11 is formed with a lens portion that achieves the same effect as the secondary curve without forming the secondary curve. That is, each cylindrical embossed lens 12
In addition to the point that the cylindrical lenses 12 are formed in a parallel state at a density of about 9 to 10 lines / mm or more, a Frennel lens type in which a wedge-shaped notch 13 is formed in the cylindrical lens 12 is used.
詳しくは、この切欠き１３の底が中央から上下方向に離
れるにつれて深くなり、またその切欠き１３内の外側
（中央部より上側では上方向、下側では下方向）を向く
斜面１３ａの傾斜角度が中央から離れるにつれて大きく
なるように、その切欠き１３を形成している。そして、
シリンドリカルエンボスレンズ１２と切欠き１３との割
合は、例えば切欠部１３のピッチをＰとすると、切欠部
１３の縦方向の長さをＰ／４として、残りの３Ｐ／４に
シリンドリカルエンボスレンズ１２を残している。Specifically, the bottom of the notch 13 becomes deeper as it goes away from the center in the vertical direction, and the angle of inclination of the slope 13a that faces the outside (upper side of the central part is upward, lower side is downward) inside the notch 13. The notch 13 is formed so that it becomes larger as it moves away from the center. And
Regarding the ratio of the cylindrical embossed lens 12 to the notch 13, for example, when the pitch of the notch 13 is P, the longitudinal length of the notch 13 is set to P / 4, and the cylindrical embossed lens 12 is set to the remaining 3P / 4. I have left.
シリンドリカルエンボスレンズ１２は入射して反射膜９
で反射し出射する光を左右方向に拡散する光学作用を行
ない、また切欠部１３は入射して反射膜９で反射し出射
する光を、ほぼ平行光に（第８図(c)は中央より上部分
を示す。）変更させる光学作用を行う。The cylindrical embossed lens 12 is incident on the reflective film 9
The optical function of diffusing the light reflected and emitted in the left and right direction is performed, and the light incident on the notch 13 and reflected by the reflection film 9 and emitted is made into substantially parallel light (from FIG. The upper part is shown.) The optical action to change is performed.
この結果、本例ではスクリーン膜を平面に設定しても反
射光が上下方向には散逸することがないので明るい高輝
度反射のゲインを保つことができるのである。しかも反
射面が平面であるため四角部分にピントずれ、デフォル
メ現象が発生することはない。As a result, in this example, even if the screen film is set to be a flat surface, the reflected light does not dissipate in the vertical direction, so that the bright high-luminance reflection gain can be maintained. Moreover, since the reflecting surface is a flat surface, the square portion does not defocus and the deformation phenomenon does not occur.
なお、このように平面スクリーン膜が望ましいが、投影
機器の写角性能により上下方向に向かう反射光の集光角
度が過不足の場合は、第１及び第２の実施例で説明した
方法によりスクリーン膜のカーブをデフォルメ等が生じ
ない程度の範囲で多少変化加減すれば良い。Although a flat screen film is desirable as described above, if the converging angle of the reflected light traveling in the vertical direction is excessive or insufficient due to the angle of view performance of the projection device, the screen is processed by the method described in the first and second embodiments. The curve of the film may be slightly changed within a range that does not cause deformation or the like.
また、この第８図に示した実施例は反射型についてのも
のであるか、反射膜９を除去してレンズ膜１１のみ或い
はレンズ膜１１とレンズ作用を持たない透明のベース膜
とを組み合わせた透過型を構成することもできることは
勿論である。The embodiment shown in FIG. 8 is of a reflection type, or the reflection film 9 is removed and only the lens film 11 or the lens film 11 and a transparent base film having no lens action are combined. Of course, a transmissive type can also be configured.
また、以上の第１乃至第３の実施例におけるすべてスク
リーン膜には、その表面に艶消しのための微細マット処
理（梨地処理）が施されることは勿論である。In addition, it goes without saying that all the screen films in the above first to third embodiments are subjected to a fine matte treatment (matte treatment) for matting on the surface thereof.
以上から本発明によれば、高輝度指向性映写スクリーン
装置の軽量化・簡易化が可能となり、また大面積のスク
リーン装置でもあってもその運搬・保管・取付が容易と
なる。しかもスクリーン膜の面を簡単に滑らかな平面に
も曲面にも設定することができ、投影機からの距離に最
もマッチした凹面にすることも可能である。更に加えて
反射型にも透過型にも幅広く適用することができる。As described above, according to the present invention, it is possible to reduce the weight and simplification of the high-intensity directional projection screen device, and also to facilitate the transportation, storage, and attachment of a large-area screen device. Moreover, the surface of the screen film can be easily set to a smooth flat surface or a curved surface, and it is also possible to make it a concave surface that best matches the distance from the projector. In addition, it can be widely applied to both reflective and transmissive types.
第１図(a)は本発明の第１の実施例の映写スクリーン装
置の正面図、第１図(b)はその垂直断面の端面図、第２
図(a)はその外周枠チューブを板状に萎縮した状態の映
写スクリーン装置の正面図、第２図(b)はその垂直断面
の端面図、第３図(a)はそのスクリーン膜の一部を巻取
った状態の映写スクリーン装置の正面図、第３図(b)は
その側面図、第４図(a)はそのスクリーン膜を完全に巻
取った状態の映写スクリーン装置の正面図、第４図(b)
はその側面図、第５図(a)(b)は本例の映写スクリーン装
置の外周枠チューブ部の拡大断面図、第６図(a)(b)が外
周枠チューブの変形例の断面図、第７図(a)は第２の実
施例の映写スクリーン装置の正面図、第７図(b)はその
垂直断面の端面図、第７図(c)はその水平断面の端面
図、第７図(d)はその外周枠チューブを板状に萎縮した
状態の映写スクリーン装置の水平断面の端面図、第８図
(a)は第４の実施例の映写スクリーン装置のスクリーン
膜の部分斜視図、第８図(b)はその垂直断面図、第８図
(c)は切欠部の光学作用説明図である。 １…スクリーン膜、２、２Ａ、２Ｂの…外周枠チュー
ブ、３…ベース膜、４…空間部、５…巻取軸、５ａ…軸
芯、６…バルブ、７…可逆回転電動ポンプ、８…スクリ
ーン膜、９…反射膜、１０…ビニール、１１…レンズ
膜、１２…シリンドリカルエンボスレンズ、１３…切欠
部、１４…マット。FIG. 1 (a) is a front view of a projection screen device according to a first embodiment of the present invention, and FIG. 1 (b) is an end view of a vertical cross section thereof.
Figure (a) is a front view of the projection screen device in which the peripheral frame tube is in the form of a plate, Fig. 2 (b) is an end view of the vertical section, and Fig. 3 (a) is one of the screen films. Front view of the projection screen device in the state where the part is wound, FIG. 3 (b) is a side view thereof, and FIG. 4 (a) is a front view of the projection screen device in which the screen film is completely wound, Fig. 4 (b)
5 is a side view thereof, FIGS. 5 (a) and 5 (b) are enlarged sectional views of the outer peripheral frame tube portion of the projection screen device of this example, and FIGS. 6 (a) and 6 (b) are sectional views of modified examples of the outer peripheral frame tube. FIG. 7 (a) is a front view of the projection screen device of the second embodiment, FIG. 7 (b) is an end view of its vertical section, and FIG. 7 (c) is an end view of its horizontal section. FIG. 7 (d) is an end view of the horizontal cross section of the projection screen device in which the outer peripheral frame tube is shrunk into a plate shape, and FIG.
(a) is a partial perspective view of the screen film of the projection screen device of the fourth embodiment, and (b) is a vertical sectional view thereof, FIG.
(c) is an explanatory view of the optical action of the cutout portion. DESCRIPTION OF SYMBOLS 1 ... Screen membrane, 2 of 2A, 2B ... Peripheral frame tube, 3 ... Base membrane, 4 ... Space part, 5 ... Winding shaft, 5a ... Shaft core, 6 ... Valve, 7 ... Reversible rotary electric pump, 8 ... Screen film, 9 ... Reflective film, 10 ... Vinyl, 11 ... Lens film, 12 ... Cylindrical embossed lens, 13 ... Notch part, 14 ... Matt.
Claims (1)
ブと、該外周枠チューブの全周に全周を密着接合させた
可撓性を有するスクリーン膜とを具備し、該外周枠チュ
ーブを流体の圧入により膨張硬直させて上記スクリーン
膜を張設するようにした映写スクリーン装置において、 上記外周枠チューブの前面側全周に上記スクリーン膜を
密着接合させるとともに、背面側全周に可撓性を有する
ベース膜を密着接合させ、上記外周枠チューブへの流体
圧入により、上記スクリーン膜が張設されると共に、上
記スクリーン膜、上記ベース膜および上記外周枠チュー
ブで囲まれる内部空間が減圧状態になるように構成した
ことを特徴とする映写スクリーン装置。1. An endless outer peripheral frame tube having flexibility, and a flexible screen membrane in which the entire circumference is intimately bonded to the entire outer peripheral frame tube, and the outer peripheral frame tube is provided with a fluid. In the projection screen device in which the screen film is stretched and stiffened by press-fitting, the screen film is tightly joined to the entire front surface side of the outer peripheral frame tube, and flexibility is provided to the entire rear surface side. The screen film is stretched by tightly bonding the base film having the base film and fluid-pressurizing the base film and the inner space surrounded by the screen film, the base film and the outer frame tube is in a reduced pressure state. A projection screen device having the above structure.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1152209A JPH0658494B2 (en) | 1989-06-16 | 1989-06-16 | Projection screen device |
| US07/538,029 US5127722A (en) | 1989-06-16 | 1990-06-13 | Projection screen device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1152209A JPH0658494B2 (en) | 1989-06-16 | 1989-06-16 | Projection screen device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0318839A JPH0318839A (en) | 1991-01-28 |
| JPH0658494B2 true JPH0658494B2 (en) | 1994-08-03 |
Family
ID=15535453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1152209A Expired - Lifetime JPH0658494B2 (en) | 1989-06-16 | 1989-06-16 | Projection screen device |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US5127722A (en) |
| JP (1) | JPH0658494B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4310590A1 (en) * | 2022-07-22 | 2024-01-24 | Ultimmersion B.V. | A concave projection screen |
Families Citing this family (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2959644B2 (en) * | 1991-03-27 | 1999-10-06 | 株式会社日立製作所 | Large screen projection display |
| US6128130A (en) * | 1997-09-12 | 2000-10-03 | Alternate Realities Corporation | Visually seamless projection screen and methods of making same |
| JP2999764B1 (en) | 1998-12-15 | 2000-01-17 | 達郎 西谷 | Projection screen |
| KR20010017995A (en) * | 1999-08-17 | 2001-03-05 | 박웅철 | Background painting for picture and method thereof |
| US6724529B2 (en) * | 2002-04-17 | 2004-04-20 | Howard Sinkoff | Reflection-type projection screens |
| KR100576612B1 (en) * | 2003-05-31 | 2006-05-04 | 최해용 | Fireproof metalic screen with surface reflection ? the method for its manufacture. |
| US8294992B2 (en) * | 2003-11-18 | 2012-10-23 | Merlin Technologies, Inc. | Projection-receiving surface |
| WO2005109092A1 (en) | 2004-05-12 | 2005-11-17 | Silas Creel | Collapsible projection screen systems |
| JP2006053289A (en) * | 2004-08-11 | 2006-02-23 | Seiko Epson Corp | Screen |
| EP1915494A4 (en) | 2005-07-29 | 2017-02-01 | The Elumenati, LLC | Dual pressure inflatable structure and method |
| CN101297241A (en) * | 2005-10-24 | 2008-10-29 | 松下电器产业株式会社 | Reflection type screen and forward projection system |
| KR100814342B1 (en) * | 2005-12-09 | 2008-03-31 | 최해용 | Screen with Sound Lamps |
| WO2011050489A1 (en) * | 2009-10-26 | 2011-05-05 | 长绩科技股份有限公司 | Projection screen |
| US7948678B1 (en) | 2010-02-06 | 2011-05-24 | Merlin Technologies, Llc | Four-region catadioptric tile |
| KR101205130B1 (en) * | 2010-07-12 | 2012-11-26 | 최해용 | the reflective projection screen with multi incident angle |
| US8243366B1 (en) * | 2011-06-27 | 2012-08-14 | Deutsch Inc. | Projection screen with wind shield |
| GB201418180D0 (en) * | 2014-10-14 | 2014-11-26 | Univ Surrey | Optical element for super-resolution imaging and fabrication method thereof |
| US20160109791A1 (en) * | 2014-10-21 | 2016-04-21 | Occasions Ltd. | Inflatable Display |
| CN106842798B (en) * | 2017-02-23 | 2019-06-14 | 江苏吉祥星智能科技有限公司 | A kind of inflation projection screen |
| CN113406853B (en) * | 2020-03-16 | 2023-12-26 | 青岛海信激光显示股份有限公司 | Laser projection device |
| WO2023020543A1 (en) * | 2021-08-17 | 2023-02-23 | 青岛海信激光显示股份有限公司 | Projection apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3720455A (en) * | 1971-08-02 | 1973-03-13 | J Sahlin | Projection screen |
| JPS4826534A (en) * | 1971-08-07 | 1973-04-07 | ||
| US4022522A (en) * | 1975-06-30 | 1977-05-10 | Irvin Industries, Inc. | Projection screen |
| JPS55144337U (en) * | 1979-04-04 | 1980-10-16 | ||
| US4323301A (en) * | 1980-05-14 | 1982-04-06 | Donald Spector | Collapsible rear/front projection screen assembly |
| DE8015655U1 (en) * | 1980-06-13 | 1980-11-06 | Stief, Horst, 4800 Bielefeld | LIGHT SCREEN FOR TRANSPARENCY PROJECTION |
| US4339175A (en) * | 1980-07-18 | 1982-07-13 | Asthausbolagen Hb Astero & Stockhaus | Projection screen |
| JPS592025A (en) * | 1982-06-28 | 1984-01-07 | Hisao Taki | Reflecting and projecting screen having high luminance |
| JPS58166335A (en) * | 1982-09-24 | 1983-10-01 | Tomoo Kikuchi | Wide diffusion screen of high luminance |
| JPS61110127A (en) * | 1984-11-05 | 1986-05-28 | Mitsubishi Rayon Co Ltd | Transmission type screen |
| JPS62181941U (en) * | 1986-05-09 | 1987-11-18 |
-
1989
- 1989-06-16 JP JP1152209A patent/JPH0658494B2/en not_active Expired - Lifetime
-
1990
- 1990-06-13 US US07/538,029 patent/US5127722A/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4310590A1 (en) * | 2022-07-22 | 2024-01-24 | Ultimmersion B.V. | A concave projection screen |
| NL2032582B1 (en) * | 2022-07-22 | 2024-01-29 | Ultimmersion B V | A concave projection screen |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0318839A (en) | 1991-01-28 |
| US5127722A (en) | 1992-07-07 |
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